The methods of identifying the authenticity of chalcedony are as follows: 1, transparency, natural chalcedony is mostly transparent, transparent in color, and its surface has waxy luster; The color transparency of imitation chalcedony is slightly lower, and the surface color is saturated and rigid, showing a glass-like luster. 2, hardness, high-quality chalcedony is hard, Mohs hardness is between 6.5 degrees and 7.0 degrees, and the surface layer is lightly scratched with hard glass without scratches. Pseudochalcedony is mostly colloid-dyed ore, and scraping its surface with glass will produce deep traces. 3, touch, chalcedony is a kind of cryptocrystal, its texture is as transparent as ice, put it in your hand to play, its temperature will not change with the temperature of your hand. Imitation chalcedony is not even enough, and there is no cold texture in the hand.